*{
    margin: 0;
        padding: 0;
        list-style: none;
}
.fu{
    width: 100%;
    margin: auto;
}
body{
        background-color: #f5f5f5;
}
.left{
    width: 300px;
    border: 1px solid #ccc;
}
.right{
    width: 300px;
    border: 1px solid #ccc;
}
.box{
    display: flex;
    justify-content: space-around;
}
.one{
    display: block;
    width: 100px;}